Adjustable panel-mold for concrete floor and roof work.



n.- B. HARTMAN.

ADJUSTABLE PANEL MOLD FOR CONCRETE FLOOR AND ROOF WORK. APPLICATION men ocnzl. m2.

1,209,151. Patented Dec.19,1916.

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R. B. HARTMAN.

ADJUSTABLE PANEL MOLUFOR CONCRETE FLOOR AND ROOF WORK.

APPLICATION men oc'r.21. m2.

1,209,151. I Patented Dec. 19,1916.

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R. B. HARTMAN. ADJUSTABLE PANEL MOLD FOR CONCRETE FLOOR AND ROOF WORK.

APPLICATION FILED 0CT.2I. 1912- Patented .Dec. 19, 1916.

3 SHEETS-SHEET 3.

55 1 1|? sr E WWW crete 4 RUDoLPH' B. HARTMAN, 0F 'MILWAUKEE, isconsin;

' ADJUSTABLE PANEL-MOLD non concnnrn rLoonAND noon wonK.

To dZZwhom it army concern.

Be it known thatI, RUDOLPH B. H RT- rented anAdjustable Panel-Mold for conloor and Roof 'Worlgofwhich the following is a specification. This inventionrelatesto monolithic structural concrete, and has for its objec t, .:gen1 .era-lly speaking, to facilitate, exped1te, and

generally improve the method and matter in which suchwork is erected, and mypresent invention is more particularly applica ble' .to the construction of the floors and roofs of buildings, taken in connection. with the columns and beams which support them.

More explicitly stated, my invention relatesto certain novel construction of falseworkused in setting up, the floors, beams and columns, and to the method and man ner of its erect1on and removal.

The construction of the falsework or.

wooden molds for the floors and'roofs of concrete buildings, is, as well known to those skilled in the art, important and the most expensive part of concrete construction. At the present time it is customary to erect these in wood, the planks constitutingthe mold beingcut to size andv-putyin place a 4 piece by p1ece. This results ma great waste of material, demands the employment of v skilled operators, and is more or less-clangerous owing to the fact that in erecting the forms and until they are completed it is necessary for the operators to support hemselves andwalk around on ledges and in dangerous positions. Now according to my method these difliculties are largely or wholly dispensed with.

Briefly stated, the method consists in constructing panel-molds, each covering one panel of the 'fioor, (that is so much of a floor as is included between three or more intersecting beams), including the. sides of the beam, and subsequently hoisting them into place.

The invention further consists in a special constructionfor such panel molds, whereby I am enabled to use. the least .material to the greatest efiect, and moreover to use said material over and over again with little or no waste; and further, in a construction whereby a panel mold of any desired size may be assembled in a minimum time, and

i 7 after the concrete is set may belremoved in I Snc'cificationof LettersPatent. PatentedDec, 19,1916, Application fil edoctoberzl plalziSeria1Noi726,940. 1

minimum time and with a minimum' of' 'al abor. MAN, of Mllwa uke'e, Wisconsin, havev "in This invention further consists in an improved system of supports for the 'beam-[ bottoms and panel-molds, enabling 'the' e0.

p'anel molds, including the f'side -facing boards of the beams," to be removed quickly from the Worl'raft'er the concrete "has been 7 poured and has sulli'ciently set, without dis- 'iturbing the supports for-the beam bottoms,

{which require to be left to set a longer time before they are removedf, i The invention further consists in a sectiOiI'zl' adjustable mold constructed jointly of ,wood'and sheet-metal, which can be ad- .justedto fit any floor-p'a'nehcan be used an indefinite number of times, can be setup very rapidly with little or no. cutting or fitting, and makes possible a far greaterv variety of'forms for the panels and beams than has heretofore been practicable. In fact my construction enables me, without any additional expense in the construction,

7 to decorate the surfaces of columns, beams and ceilings with ornamental capitals, moldings, and rosettes andthe like, and to vary these to an infinite number of patterns.

Myinventionfurther consists in theconstructions, combinations and other features which are hereinafter described and more particularly set forth in my claims.

In the accompanyingdrawings I have shownfseveral" forms (arm invention to enable the principle thereof to be readily ap prehended, and herein I Figure 1 is a plan of a sectional panel form or mold constructed according to my lnvention; Fig. 2 1s a bottom plan of a s1m1- lar mold Fig.3 shows in transverse section twopanels of thesame construction, the section. plane being indicated by the line 3 in Figs. 1' and 2;,Fig. 4. is a perspective View from the under side of one of the sections of the side-pieces of the same panel-mold; Fig. .5 is a perspective view from the under-side of one of the corner-pieces of the same with an'in'set; Fig. 6 is a perspective view of an ornamentalinset-piece for the column-cornerof the'panel; Fig. 7 is a fragmentary transverse section through portions of two ,panelsshowing an intermediate beamform andsupport'; Fig. 8 is a plan of another form of adjustable panel-mold Fig.

i 9 is atra'nsverse section through two panels 7 of the same construction on the planes indicated hythe lines 9 and 9 in Fig. 8; Figs. 10, 11 and 12" are end-views of difier-l ently formed side-sections for'similarly constructed molds; Figs. 18 and 1 1 are respectively a front view of a transversesection of an ornamental molded section for such a n1ol'd;Figs; 15 and 16 are transverse-sections' showing two forms of my adjustable plank for center filling; Figs. 17 andl'S are respectively a plan and transverse sec tioii on the plane 18 throngh a simplified construction of a-corner of a panel-mold, in

ivhi'ch the jspeciz l cornei piece. jisfdispen d with E1 19 1s 'a plan-view oi'a panel-mold shosving a somewhat different arrangement of the center-planks and adapted for an ornamental ceiling rosette and adapted also.

for a center column instead of an intermediate column; Fig is an 'ornamental'ceiling rosette or -center-piece whl'ch'maybe used v with the form'of mold shown in 1 9;

Fig. 21 is a plan-view ofa panel-mold adapted to produce a' paneled or tess'ellated ceiln'g; Fig. 221s a plan of the frame of a con tinuous moldi'or paneled ceilings,oi those which the beam runs in one direction only;

' Figs. and are respectively an elevation and a transverse section '01 a side-section with strengthening means for the flat surface; and Figs. 25 and 26 are similar views'of another form of the same. V

My sectional mold its most approved form may be used for any dimension of floor-panel, and may he used over and over again Without injury. As illustrated in Figs. 1, 2 and 3, it comprises 0111 sidememhers and four corner-members; each side-member being made. up in sections (vvhich may or may not be all the same sine) joinedend to end in amanner hereinafter described, and the corner-member's designated 32 being placed so as to overlap the side-i'n'emb ers ava'riable distance. Further,

Where (as is usually the case) there is a column in one corner of the panel, a special either of sheet-metal or vo'o'd, but experience,

has shown that they are both cheaper and more eifgective if made ivoo'd as SllOWIl iIl the illustrat on, v offering greater stifiness, and moreover greater ease of construction since the sheet-metal can be simply nailed forming a seat for onto the women gussets, and the latter can be used to give themetal its shape. The

flange 39 should have a depth equal to one of the planks 30 or 31, Which are used for the center filling, so asto bring the face 87 substantially flush therewith. .The gussets 10' may be set to half the thickness of a plank inside the end of the section, so that when two sections are placed end to end t iere will space equal to the thickness of a plank hetween the gussets, this space the sea of an e'dgewise set plank The tvvo adjacent sections and, the-plank 11 are secured together by bolts 42 passing throhgh holes 43 in the gus'se ts, and nails or other fastenings may also he used to secure themjtog'ether. Where, as; shown, the sideface 36 of the panel-mold 1s oblique, the ends ofthe planks 41 are preferahly'cut to a like obliquity, so that their lower edges bear on the flanges 38.

shown in the drawing, across-beam 11 iftehds Eromside to side atthe ends of each section on the longest side, and these beams may consist, if desired, of a single piece, but Where the dimensions of the panels from one floor to the next vary, it will be desirable to form them of two planks 41 spliced together as shoivnpwhereby only one end of each plank is out on the bevel, landthe two planks are nailed together to the proper length in setting up the panel. l-Ifoivever it is not essential that this special eo'nstruietion be adopted,.ndr is it essential to my invention that the gussets should set as shown, n or that the cross-beams shonld coine'a t the ends of the panels. It

I should be understood that the sheet-metal us ed the construction '01"- the panels is ordinarily so thin. that one section of the side ma bverla; I the adjacent one, and additional ptuss'ets may be nailed on to the sections riom time to time in any position ivhere it may he found desirable to usethem for the support of the cross-beams.

L lhe 'shorter sides are supported in turn from the planks 11 by means of a set of short planks 5L5, each having also one end cut on the bevel, and secured to the ends of section in the Same manner as the planks 11, and having their other end abutting against the adjacent plank 11 and nailed or otherwise secured thereto. To stiffen the frame thus formed in raising it into place a longitudinal plank 16 may be nailed along the under-side to each of the planks 11 and opposite planks 15, and one or more of the filling-planks may ,also be. 'nailed to the planks Th se filling-planks 30 and 31 iipon the cross-he ams ll to fill the open central space,and, as disclosed in my prior applieation, Serial No. 422,537, filed March 21, 1909, "they are not intended to close the'space entirely, but to support the sheet-metal whichis laid upon them, and

, directly support the concrete. I According to my improved construction herein described,

however, I have "provided 'the adjustable planks 3O and 3l, which are'illustrated' separatelyin-Figs. 15 and16. (According; to this constructiom the edges of the planks are 1 beveled onboth'edges (Fig-15) or only on oneedge ig. 16),.whi'chmakesa number ofsaid planks laid: in series adjustable. to any desirable-width; To obtain the desired width, it is merely necessary to ctakesone more plank than the total'number'zwhich will-when set with the wide side up com-v pletely fill the space, and then'reverse one or more of the planks, until the totalwidth of the series is brought down-to the required 7 width. Where one edge only is beveled,-the

adjustment for a given angle of bevel can be carried out more accurat'ely than where both edges are beveled; and if desired,iboth kinds of plank may be. used incombinationfl V The'use of this improved adjustable plank renders a sheet netal covering unnecessary provldedthe plank be cut to the proper length; and even this is not necessary where the construction of Fig. 19 hereinafter described is employed. 7

The side-pieces and end-pieces of the mold having been unitedtogether in-proper relation with the cross-beamsitl and planks 45,

and the whole stifiened by the plank 46 in the manner described, is hoistedminto place 'as a unit upon the beam-forms or beambottoms, which are supported in the usual manner upon. posts 47. When in place, the

corner-pieces 32, 33.and*inset 34* and the planks 30. and 3l'a-re added, and, the floorpanel is complete In the corner of the panel where a'column occurs, it is necessary to use either'a special corner-piece fitted to the" column or else out away a corner ofthe cornerpiece and fill .it with a special inset 34;. To prevent the corner-piece so cut away from spreading, the diagonal gusset is used on the inside, connecting the two side-faces thereof. The "in- .set so-introduced may be ornamental, as shown at 44: m F 1g. 6, and the edges where it overlaps'may be depressed, as shown, but this is unnecessary 1n ordmary work. The inner -or reentrant corner or the cornerpiece may have its edges provided with flanges 49 overlapping the flanges 39. of the side-pieces. Beam-bottoms and molds used according to this style of construction for,

. .edge-planks52, the-latter supporting the several I members of the- -mold individually,

1while the beam-bottom 53 7 is supported at 1-. a greater or lessvheight above the planks 51, a according to 1 the" depth desired, ,byinter;

posed blocks 54.v

sheet-n'ietal mold accordin g to'my invention, this one being composed of four equal one- .rpiece sides55 and "four equal one-piece cor 11ers 56.x. The corners aremade so long as. to provide for any variation which mayfoccur in the length andbreadth of panels, 'by;ca1us- 111g them to overlap the side-pieces to a greater or less extent. In this case thes1de- Fig. Sshows a somewhat dilferent form of piecesof two opposite sides are securedv together by transverse planks 57., which are secured to the gussets 58, In this case shown :as of sheet-metal,.one on each'end and two in the'middle of each sidepiec e; more may be .used iffound necessaryor desirable. Longitudinal planks 59supporttl1e other two sides 55 from theplanks 57 in' conjunction with twolplanks 60 extending lon'gi--' .tudinally' above and below the frame'and secured to the planks 57 and 59. The plank so 7 (30 may be left in place after hoistingthe' panel-mold and will not interfere with the placing of my adjustable planks at eachside thereof. -'At one corner 61 is-shown an inset 62 adapted to a circularzcolumn. The filling-planksare omitted in this illustration.

Inthis sectional mold construction the beamside as Well as the columns may be molded into the, ornamental forms used in high class archltectural work, so as to give anornajmental cornice in relief around the entire panel, which hasnot been heretofore prac- I tlcable in concrete, especially in bulldings where cost is an object. .Figs. 10 to 14- lncluslve beam and floor. Fig. 11 shows'a cavetto and bead 'combination; Fig. 12 is .a reversed cyme, and Figs. 13 and 14 an upright cvme', inthe lattercase' having ornamental friezework impressed in relief. In the last three.

forms a stiffening angle .64 is employed if c necessary. for the loweicarved portion and also forms an abutment the lower edge 7 of the frame-plank.

illustrate some possibilities inthe way of ornament. Fig. 10 a fillet 63 is employed between the Figs. Hand 18 show asimpler methodof 'oorneriormationwhichfare used for general rough work; where nicetyof adjustment is not required, or the forms are made tofit' the panels in a certain building. In this construction I dispense with the cornerpieces entirely, the-1sidepieces 65 being directly overlapped "at the corners. One of said side-pieces may be provided with a wooden'gusset 66 at the-corner, and: the other sidepiece is without a gusset at the corner, as shown." The panel-mold illustrated in Fig; 19 is similar-tothatalready shown in Fig. 8, eX-

I cept that it-is destined to a; panel where; the

c'ase. one ofthe four side-pieces 55 is re: placed by a special si e-piece 67, having a portion of the edge out out to receive a nninset 68. This panel is destined to receive a sheet-metal plate 69 having the, form of. an ornamental ceiling rosette s'tanipcdin relief thereof, consequently the l lanlfs' 70, which close the center of the melt, are arranged somewhat differently from those previously shown, the middle Ones being somewhat thinner than the outer ones and a part of the planks on the ends of the moldbeing arranged crosswise as indicated at 71; Gf course, these are simply loose planks which need not be cut with beveled edges' l Vhen the plate 69 is set in 1 the center, tne remainder of the mold surface will be covered by ordinary metalsheet as usual. lhe arrangement of the planks in Fig. 19', however, may be used for the adjustable mold to dispense with sheetmetal surfacing, .in which case the trans versely disposed planks at the ends, or at one end of the r. old, would make itunnecessary that the other planks be cut to' the length of the panel, provided they are all the same length. I In Fig. 21 is shown a mold-form 7 2 provi'ded with a special stamped ceiling-sheet. 23, which is formed in relief, so as to give paneled or tessellated effect of the resulting concrete. This sheet covers practically the whole surface of the mold, and not require any additional metal sheets. Thus far I have spoken more particularly ofthat construction in Which the main and subsidiaryb'eams cross each other at an angle, generally a right angle. However, in niany' cases the beams run 111 one direction only, there being no subsidiary beams. In

such cases, the panel-molds could still be used, by placing the adjacent sides so asto abut one another, without leaving room for a beam between them. This arrangement is equivalent to narrowing the Width of the beam down to nothing, the planks 52 being brought close together and the beam-sup ports remaining as before.- However, it is simpler-in such cases to provide an endless mold of the type shown in Fig. 22, in which a number of side-sections 55' are secured together end to end w1th dlstan'ce-planks 57,

the same as shown in Fig. 8. Some of these side-sections 67 are cut out to permit of column=insets 68, as may be desired, and at the ends special sections 74: are used having quadrantal column-insets 75.

In case of the side-sections 35 and 55, it will be found advantageous to introduce in place of intermediate insets longitudinal strengthening devices, whereby the sections can be made much longer than otherwise Without any transverse gussets, except upon against as to be readily removable.

:after. pouring eXerts' a notable bulging effect.

For this purpose, 1 introduce reinforcing-planlis as illustrated ,in'Figs. 23 to 26 inclusive. vvIn Figs. 23' and 24: the strengthening planks 7 6 are set edgewise' to the sidewall 36 of the Isectiombeing supported by cleats 77, 78 fastened to the inner faces of th'egussets, and projecting metal tabs 79 on their lower edges. ,In Figs. 25 and 26 the strengthening plank 80". is secured fiatwise theinner face of the sidewall 36 by means of cleats 81, the lower edge of the plank resting up'on the bottom flange 38 of the section. These strengthening-planks, it will be understood, are ordinarily so placed From the above description it will be readily seen that my invention is not limited to special forms and. mechanical constructions such as I have hereinabove shown by way of illustration, but that the principles thereof are expressible in a variety of ways as will be well understood by those skilled in the art; therefore the scope of my claims is to be interpreted in view of such alternative constructions.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is t '1. An adjustable panel-mold for concrete floorand roof-work comprising four sidepieces and. four corner-pieces mutually admeans for securing said pieces together in "rigid relation; and transverse supports extending across the opening "of said frame and below the surface thereof to support a plurality of filling-planks thereon flush with the surface of said pieces.

2. An adjustable panel-mold for concrete fio'orand roof-work comprising four sidepieces in opposite parallel pairs, four corner-pieces slida'ble over the ends of said sidep'ie'ces, means for securing said pieces together rigidly in any desired relation; and transverse supports extending across the opening of said frame adapted to support a plurality of filling-planks thereon and with their upper surfaces flush with the frame.

A panel-mold for concrete floor-- and roof-work comprising a pair of parallel sidepieces, a plurality of transversebeams connecting said side-pieces, a pair of parallel end-pieces, a plurality of longitudinal beams nee ting saidrside-ipieces, a pair of parallel end-pieces, a plurality of longitudinal beams connecting said {end-pieces with adjacent transverse beams, and corner-pieces fitting over the ends of said" side and end-pieces; 7

one or, more of said corner-pieces having; a portion. cut away, andan inset'ofspec al form inserted in place thereofl 5. An adjustable panel-mold for. concrete floorand roof-work comprising a plurality of sheet-metal members sliding one over the other andforming sides of adjustable length, each member havinga top-face and a side.- face; and a downwardly projecting flange formed along the free edge of the top face;

and means for securing said members together in rigid. relation.-

' -6. An adjustable panel-mold for concrete floorand roof-work comprising a plurality of sheet-metal members sliding one over the other and forming sides of adjustable length, each member having-a top-face and a sideface; an inwardly extending'fiange: formed 4 along the lower or free edge of the side-face and means for securlng said members to-' 7 gather in rigid relation.

- 7 In an adjustable mold 'for concrete floorand roof-work, the combination of side-pieces and end-pieces to form a frame having theshape of a panel, said side-pieces being made up of a plurality of sections secured together end to end, and a set'of corner-pieces each'adjustably sliding over the f ends of the adjacent side and'end-pieces.

8; In an adjustable mold for concretefloorand roof-work, the combination of s1de-p1eces and GIICl-PIGCGS tOfOI'm aframe having the shape of a panel, said slde-pleces being made up of a-plurality'of sections socured together end to end; beams connect- 1ng opposite s1de-p1eces, and means connect ing the adjacent end-pieces to said beams.

,j 9. In a sectional adjustablepanel-mold for concrete floor and roof-work, a side-section comprising a sheet of metal haying'a topface and a side-face: and one or moretransverse gussets on the under side connecting said side-face and top-face together, an in-.

wardly turned flange on the lower edge of said side-face, and a downwardly turned flange on the free edge of said top-face.

10. In-a sectional adjustable panel-mold for concrete floor -.and..roof-work,.a sheetmetal section having top face and side-face, J and a pan of transverse gussets connecting said side-face and top-face near each end thereof and separated from the end by a small distanceapproximately equal to half the thickness of a plank, whereby two of said sections may be secured end to end by bolts connecting two adj acent gussets with a plank between them. J j j 11. An adjustable panel-mold for concrete floor and roof-work comprising fourw side-' pieces in opposite parallel pairs, each sidepiece comprisinga top-face and a side-face of short subsidiary beams-extending at rightangles to said first-mentioned beams and T piece comprising a top-faceand a side-face transverse gussets connectlngthe two faceson the underside, a'p'lurality of trans- ,Verse beams connecting'twoopposite side faces and secured to said 'gussets, and a plu- V7 rality ofshort subsidiarybeams extending at right-angles to said first mentioned beams v and each secured'at one end to a gusset of the other two side-pieces and at its other end abutting upon and secured to the outermost ofsaidcfirst mentioned beams. j a 12; An adj ustable panel-mold for concrete floor and roof-work comprising four sidepiejces in opposite parallel pairs, each sideand transverse gussets" connecting the two' faces on the under side; a pluralityof trans verse beams connecting ".two o pposite, sider faces and secured to 'saidigussets, aplurality eachsecured atone end to a gusset of the othertwo "side-pieces andat its other end abutting upon ands ecuredtotheoutermost L ofjsaid first-mentionedlbeams, andf'one or 7 more longitudina'l horizontal planks secured verse beams 'co'nnectingltw'o, oppositeside- 10o faces and secured to said gussets, a plurality of short subsidiary beams extending at rightangles to said first mentioned beamsfand leach secured at one-end to a' gusset of the other two side-pieces and at its other end abutting upon and secured to the outermost ,of said first-mentioned beams, and ap'lural- 'ity'of filling-planks resting on; said beams andfill'ing theopeningbetween the sides, the top surface of the planks'being flush with the'top'faCes of the side-pieces. 14. adjustable panel-mold for concrete floor and roof-work, comprising four sidev pieces in opposite, parallel pairs, each sidepiece comprising a top-facefand a side-face and transverse gussets connecting-the two faces on the underside, a plurality of transverse beamsconnecting two opposite side faces/and secured to said gussets,a plurality of short subsidiary beams extending at'120 right-angles tosaid," first-mentioned beams andeach secured at one end to a gusset of the other two side-pieces and at its other end abutting upon and securedto the outermost of said first-mentioned beams, a

filling the opening between the sides, and a sheet-metal covering extendlngover andj covering said central opemng.

15. In a sectional panel-mold for concrete'ise plurality of- 5125 filling-planks resting o'n' said Ibeamsfandffi floor and roof-Work, a corner-piece having a top-face and two adjoining side-faces and having open ends and downturned flanges ormed on the edges of the reentrant angle or said top-face.

16.111 a sect'onalpanelniold for concrete floor and roof-work, a corner-piece having one angle cutaway or suppressed, and a sreciakformed nset adapted to in said cut-away or suppressed angle. j

1'4'. A sectional adjustable panel-mold for concrete floor and roof-Work comprising, in combination, two opposite lateral sides, each of said sides having a top-face and a sideface and aplurality oftransverse gussets uniting said top-face and side-face on the under side, a plurality of transverse beams connecting sail opposite lateral sides, each beam being formed of two planks overlapping by a variable amount depending on the size of the panel and having one end of each secured to the gussets of said lateral sides, tWoend-p eces each havinglilrewise a top-face and sideface and transverse gus se c nnect ng t em me ns edies aid nd-p cst (S d b ms, and ur in pieces connecting said lateral sides and endpieces.

'c 1 8. An adjustable mold for concrete floor and roof-Work comprising, in combination, two opposite lateral sides, eachof said sides havinga top-face and a side-face and a pluity" ft a e se ei s t unit g ai t pfae and s eace Q the und Side, a P ra ty of ns r ams. onnec ing said appo ite ate l sides, fil ing of P ank fiPP ted y aid tra v e ea s s stantially fiush with said top faces and ex ending from side to side between the sidemembe'rs, and a sheet-metal coyering over 7 the Whole.

l9. Anadjustable mold for concrete floor and reef-W k c pris g, in rminati n We i t i s l a-e ma e p 1 Plurality of sheet-metal members, each inemha ing at n e and a s i n and Que m r gu et j ni g th m o t e d stanee nien bers extending between the two Sides an connected t W gusse s nd a cont nuous covering from side to side sup ported by sald dlstance-members; one or fined by said projectienl pieces, a plurality more of Work comprising sheet-metal side-members, each-side-meinber formed n sections separate from eachother, distance-members in a the nature of beams extending from side to a side of'said side-members and united thereto, and a set of adjustable plankshaying beveled edges extending transversely from side to side and between said sections, Whereby the area covered by the planks may be varied by re ersing one or more planks.

21. In a mold for concrete floor and roof- Work, a sheet-metal side-member provided with a sideand top-face and a pair of gus: sets connecting them, a horizontal flange extending inwardly from at or near the bettom of said section, and a projection on the face of each gusset whereby a plank may be inserted close 'to the side-Wall of said member supp'crted by sald' fiange and con 22. Ina meld for concrete floor and roofork, a sheetmetal side-member having a side-face and a top-face and a pair'of gussets connecting them, a long-itudinal plank removably supported between said gussets and abutting on jsaidQside-face, lugs or projections under said plank, and other lugs or 'projectiens on said'gussets adapted to confine'said p'lank in position ag'alnst lateral pressure, whereby said plank is caused to support said side ztace.

25 A panel-moldi or concrete floor and roof-Work comprising a pair of parallel side of transverse beams connecting said'side-pieces, a pair of parallel end-pieces, a plurality of longitudinal beams connecting said end-pieces with the adjacent transverse beams, and corner-pieces fitting over the ends of said side and end-pieces and slidably adjustable with relation thereto.

j 111' "*itne'ss' whereof I have hereunto set my hand in presence of tWo Witnesses.

BUDQLFH Hamma- Witnes ess i lvLlllAL oW,

V Gnonen W. 'Qonnns.

Co pies of this patent may be obtained fror five cents each, by addressing the ifflommissioner of Patents,

' washi t nefl 7 f s 

